496
FNCA52 TJSJ 130730
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
330 AM AST SUN SEP 13 2026
DISCUSSION
NO FIRE DANGER IS EXPECTED TODAY.
PRZ014-132000-
SOUTHEAST COASTAL PLAINS-
330 AM AST SUN SEP 13 2026
TODAY TONIGHT MON
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 30 20
TEMP (24H TREND) 92 (0) 75 (-3) 92
RH % (24H TREND) 47 (-8) 86 (+3) 49
WIND 20FT/EARLY(MPH) E 16 E 13 E 17
WIND 20FT/LATE(MPH) E 20 NE 11 E 18
MIXING HGT(FT-AGL/MSL)5620 4870
TRANSPORT WND (MPH) E 16 E 15
VENT RATE (KT-FT) 78680 63310
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-132000-
SOUTHERN HILLS-
330 AM AST SUN SEP 13 2026
TODAY TONIGHT MON
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 10 40
TEMP (24H TREND) 90 (+2) 71 (-4) 89
RH % (24H TREND) 57 (-2) 96 (+7) 58
WIND 20FT/EARLY(MPH) E 12 E 11 E 12
WIND 20FT/LATE(MPH) E 14 E 10 E 12
MIXING HGT(FT-AGL/MSL)6070 5360
TRANSPORT WND (MPH) E 15 E 14
VENT RATE (KT-FT) 78910 64320
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-132000-
NORTH COASTAL PLAINS-
330 AM AST SUN SEP 13 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 10 30
TEMP (24H TREND) 91 (0) 75 (-3) 91
RH % (24H TREND) 60 (-3) 96 (+6) 61
WIND 20FT/EARLY(MPH) E 14 E 17 E 13
WIND 20FT/LATE(MPH) E 18 E 10 E 16
MIXING HGT(FT-AGL/MSL)5000 4800
TRANSPORT WND (MPH) E 17 E 15
VENT RATE (KT-FT) 75000 62400
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-132000-
NORTHERN HILLS-
330 AM AST SUN SEP 13 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 30 10 50
TEMP (24H TREND) 89 (0) 72 (-3) 90
RH % (24H TREND) 61 (0) 97 (+4) 62
WIND 20FT/EARLY(MPH) E 13 E 13 E 11
WIND 20FT/LATE(MPH) E 16 E 9 E 13
MIXING HGT(FT-AGL/MSL)5520 5340
TRANSPORT WND (MPH) E 15 E 12
VENT RATE (KT-FT) 71760 53400
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-132000-
WEST COAST-
330 AM AST SUN SEP 13 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 70 20 60
TEMP (24H TREND) 92 (0) 73 (-2) 94
RH % (24H TREND) 58 (-3) 97 (+6) 58
WIND 20FT/EARLY(MPH) E 12 E 12 E 11
WIND 20FT/LATE(MPH) E 13 E 9 SE 11
MIXING HGT(FT-AGL/MSL)5280 4910
TRANSPORT WND (MPH) E 10 E 8
VENT RATE (KT-FT) 47520 34370
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-132000-
EASTERN INTERIOR-
330 AM AST SUN SEP 13 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 30 50
TEMP (24H TREND) 90 (+1) 73 (-3) 90
RH % (24H TREND) 59 (-1) 97 (+6) 60
WIND 20FT/EARLY(MPH) E 11 E 11 E 12
WIND 20FT/LATE(MPH) E 12 E 11 E 12
MIXING HGT(FT-AGL/MSL)6520 5470
TRANSPORT WND (MPH) E 14 E 14
VENT RATE (KT-FT) 78240 65640
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-132000-
LUQUILLO MOUNTAIN RANGE-
330 AM AST SUN SEP 13 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 40 50
TEMP (24H TREND) 86 (+3) 71 (-4) 85
RH % (24H TREND) 64 (-4) 99 (+5) 64
WIND 20FT/EARLY(MPH) E 10 E 9 E 11
WIND 20FT/LATE(MPH) E 10 E 9 E 11
MIXING HGT(FT-AGL/MSL)4410 4800
TRANSPORT WND (MPH) E 15 E 15
VENT RATE (KT-FT) 57330 62400
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-132000-
CENTRAL MOUNTAIN RANGE-
330 AM AST SUN SEP 13 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 60 20 70
TEMP (24H TREND) 88 (+3) 68 (-4) 87
RH % (24H TREND) 63 (0) 98 (+5) 63
WIND 20FT/EARLY(MPH) E 9 E 9 E 9
WIND 20FT/LATE(MPH) E 10 E 6 E 9
MIXING HGT(FT-AGL/MSL)6420 5840
TRANSPORT WND (MPH) E 13 E 9
VENT RATE (KT-FT) 70620 46720
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-132000-
CAYEY MOUNTAIN RANGE-
330 AM AST SUN SEP 13 2026
TODAY TONIGHT MON
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 40 40
TEMP (24H TREND) 86 (+1) 71 (-3) 86
RH % (24H TREND) 63 (0) 99 (+4) 64
WIND 20FT/EARLY(MPH) E 11 E 10 E 10
WIND 20FT/LATE(MPH) E 11 E 8 E 11
MIXING HGT(FT-AGL/MSL)5590 5090
TRANSPORT WND (MPH) E 16 E 15
VENT RATE (KT-FT) 78260 66170
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-132000-
VIEQUES-
330 AM AST SUN SEP 13 2026
TODAY TONIGHT MON
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 30 30
TEMP (24H TREND) 90 (0) 78 (-3) 90
RH % (24H TREND) 58 (-1) 86 (+4) 57
WIND 20FT/EARLY(MPH) E 14 E 14 E 14
WIND 20FT/LATE(MPH) E 13 E 14 E 13
MIXING HGT(FT-AGL/MSL)3410 3400
TRANSPORT WND (MPH) E 17 E 16
VENT RATE (KT-FT) 51150 47600
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-132000-
CULEBRA-
330 AM AST SUN SEP 13 2026
TODAY TONIGHT MON
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 30 30
TEMP (24H TREND) 91 (+1) 79 (-3) 91
RH % (24H TREND) 60 (-4) 89 (+5) 59
WIND 20FT/EARLY(MPH) E 13 E 14 E 14
WIND 20FT/LATE(MPH) E 13 E 14 E 13
MIXING HGT(FT-AGL/MSL)3430 3350
TRANSPORT WND (MPH) E 17 E 16
VENT RATE (KT-FT) 51450 46900
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-132000-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
330 AM AST SUN SEP 13 2026
TODAY TONIGHT MON
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 20 30
TEMP (24H TREND) 92 (0) 75 (-2) 93
RH % (24H TREND) 48 (-9) 86 (+2) 48
WIND 20FT/EARLY(MPH) E 16 E 14 E 14
WIND 20FT/LATE(MPH) E 19 E 13 E 17
MIXING HGT(FT-AGL/MSL)5770 5230
TRANSPORT WND (MPH) E 13 E 14
VENT RATE (KT-FT) 63470 62760
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-132000-
SAINT THOMAS AND SAINT JOHN-
330 AM AST SUN SEP 13 2026
TODAY TONIGHT MON
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 20 20
TEMP (24H TREND) 89 (+2) 78 (-3) 88
RH % (24H TREND) 61 (-4) 90 (+5) 61
WIND 20FT/EARLY(MPH) E 14 E 14 E 14
WIND 20FT/LATE(MPH) E 13 E 14 E 13
MIXING HGT(FT-AGL/MSL)3390 3380
TRANSPORT WND (MPH) E 16 E 18
VENT RATE (KT-FT) 47460 54080
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-132000-
ST CROIX-
330 AM AST SUN SEP 13 2026
TODAY TONIGHT MON
CLOUD COVER MCLEAR PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 30 10
TEMP (24H TREND) 90 (+2) 78 (-3) 89
RH % (24H TREND) 62 (-5) 89 (+3) 63
WIND 20FT/EARLY(MPH) E 14 E 14 E 14
WIND 20FT/LATE(MPH) E 13 E 13 E 14
MIXING HGT(FT-AGL/MSL)5000 5130
TRANSPORT WND (MPH) E 18 E 17
VENT RATE (KT-FT) 80000 76950
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
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